6.Some service requires the need to remove the unit from the wall including replacement of the indoor coil and/or the outdoor coil. Also servicing the outdoor fan motor or fan blade will require removing the unit from the wall if the unit is installed at a height that is not easily accessible from the outside of the building.
In order to remove the unit from the wall the following procedure must be used:
a.Turn off power to the unit at the remote location. Some units may have more than one power supply.
b.Disconnect field wiring at unit terminal block and remove from unit.
c.Disconnect condensate drain.
d.Remove the lower skirting around the unit.
e.Remove wall mounting brackets from wall on each side of the unit.
f.If unit is attached to duct work, remove upper cabinet extension by removing the top center screw only from the cabinet side panel.
g.Remove screws that attach the duct work to the unit flanges.
This unit is equipped with four rollers mounted to the base. For ease of pulling unit out from the wall, you may want to remove the bottom service door which requires removal of the return air panel, and grip the front flange of the base pan then pull straight out.
7.Annual maintenance is required to make sure that all of the systems are functioning properly.
a.Check to make sure that the drains are not obstructed in any way.
b.Remove any debris in the condenser section of the unit.
c.Inspect and clean mist eliminator as described below.
d.Inspect and wash outdoor coil as necessary.
MIST ELIMINATOR SERVICE
A mist eliminator is supplied with the wall sleeve. The mist eliminator is constructed of an aluminum frame and mesh. The mist eliminator is located in the top section of the wall sleeve and can be removed from the inside of the building without removing the unit from the wall. This requires that the ventilation package must be removed.
It is recommended that the mist eliminator be inspected annually and serviced as required. The mist eliminator can be inspected from the outside of the building by looking through the outdoor grille. The mist eliminator can be serviced from the outside by using a vacuum cleaner. The outdoor grille must be removed. Use the vacuum to remove dirt and debris from the surface of the mist eliminator. If additional cleaning is required, the mist eliminator will have to be removed from the sleeve.
The ventilation package will have to be removed to gain access tot he mist eliminator. If the blank off plate option is used, it is not necessary to service the mist eliminator. The steps necessary to remove each of the vent options are listed on the following pages.
The mist eliminator can be cleaned by washing with soap and water. The excess water should be shaken off the mist eliminator before it is reinstalled.
VENT OPTIONS
BAROMETRIC FRESH AIR DAMPER (Standard)
Before starting, make sure the power has been turned off. The return air grille panel must be removed. The fresh air damper assembly can be seen on the back of the unit. See Figure 21.
1.The fresh air damper is attached to the back of the unit with one screw on either side of the assembly. Both of the screws must be removed.
2.Once the mounting screws are removed, tilt the assembly down and lift it out.
The mist eliminator can be seen through the opening. The mist eliminator must be raised up and the bottom can be pulled toward the front of the unit.
ECONOMIZER OR COMMERCIAL ROOM
VENTILATOR (Option)
Before starting, make sure the power has been turned off. The return air grille panel must be removed. The economizer (EIFM) or commercial room ventilator (CRV) can be seen after the panel has been removed. The CRV or EIFM must be removed to gain access to the mist eliminator.
1.The two mounting screws in the front of the EIFM or CRV must be removed.
2.The power connectors for the CRV (located on the right side of the unit) must be disconnected. Squeeze the tabs on the sides of the connector and pull straight out. Unplug both of the connectors.
3.Slide the EIFM or CRV straight out of the unit.
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